illuco.com website review

4 files block the first paint until they finish downloading. Deferring or inlining them could save about 1.0 s.

Your mobile performance score is 79. Pages that score under 90 lose visitors before the first paint.

About 71 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 300 ms faster on a phone.

About 351 KiB of JavaScript is downloaded but never used on this page.

A phone's processor spends 2.4 s on main-thread work while loading, 491 ms of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

The page has 2,389 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

Shopify costs a phone 124 ms of main-thread work and 783 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

8 third-party services load with your homepage (Shopify, sealsubscriptions.com and shop.app and others), adding 932 KiB and 161 ms of main-thread time.

3 long tasks block the main thread while loading, the longest for 76 ms. During a long task the page ignores taps.

21 files are served with short cache lifetimes, so returning visitors download them again (38 KiB).

33 KiB could be saved by minifying JavaScript.

Polyfills for old browsers add 8 KiB JavaScript that modern phones do not need.

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

Scripts make the browser recalculate the layout repeatedly while the page loads, which wastes processor time on phones.

5 KiB could be saved by minifying CSS.

Your largest element takes 5.3 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image.

The page becomes fully interactive after 8.3 s. Good is under 3.8 s.

Over the last 25 four-week periods to 2026-11-07, real Chrome visitors' tap response (inp) went from 143 ms to 244 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Over the last 25 four-week periods to 2026-11-07, real Chrome visitors' largest content (lcp) went from 1.8 s to 2.2 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Visually, the page fills in at 3.8 s (Speed Index). Good is under 3.4 s.

Your homepage downloads 2.6 MB in 346 requests on a phone: scripts 1.0 MB (164), other files 782 KiB (100) and images 397 KiB (23). Under 2 MB keeps phones on slow connections fast.

ergo-bn_mb.jpg is on the first screen but marked loading="lazy", so the browser waits before fetching it and the page looks finished later. Load it eagerly (and give it fetchpriority="high" if it is the main image).

By the Sustainable Web Design model, a visit to your homepage emits about 0.74 g of CO₂e: 88.4 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

10 images have no alt text, which hurts accessibility and image search.

14 visible links have no text or label, so screen readers cannot say where they go.

Headings should not be empty: 1 element on the page fails this check, rated minor by axe-core.

Headings skip levels (h2 → h6, h1 → h6 and h2 → h4), which makes the page harder to scan with a screen reader.

There are 2 <h1> headlines (“” and “Precision Loupes, Headlights & Dermatoscopes”). One clear main headline is easier for people and search engines.

The homepage links to 96 pages on illuco.com and 16 external pages.

https://illuco.com/customer_authentication/redirect has no <title>, so Google invents the link text in results.

https://illuco.com/customer_authentication/redirect is marked noindex but linked from your homepage. If it is meant to be found, remove the noindex.

https://illuco.com/customer_authentication/redirect has no meta description, so Google writes the search snippet from whatever text it finds.

https://illuco.com/customer_authentication/redirect has no <h1> headline, so visitors and search engines get no clear main topic.

We fetched 15 pages linked from your homepage (of 46 found) and read each the way a search engine does.

7 of 30 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

Chrome logged issues while loading the page (“Content security policy”).

No analytics or tag manager detected in the HTML, so you can't measure whether any of these fixes work.

Your longest form asks for 9 fields (7 required). Every extra field lowers completion.

No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

The homepage carries about 900 words of visible text.

Before a visitor clicks anything, the page loads Google Ads, Google Analytics, Google Tag Manager, Meta Pixel and Microsoft Ads and 1 more (measured from a US location before any click). No consent tool was detected. Visitors from the EU, UK and several US states must be asked first.

Opening the homepage sets 11 cookies (measured from a US location before any click).

No known cookie consent tool loads with the page. Some sites build their own banner, and some only show one to visitors from the EU.

Loading the homepage contacts 27 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.